Marissa Mayer, one of the top professionals at Look for engines, will be the next primary of Look for engines, making her one of the most well-known females in Rubber Area and business The united states.

The consultation of Ms. Mayer is consider a hen house for Look for engines, which has fought nowadays to entice top ability in its fight with opponents. One of the few community looks of Look for engines, Ms. Mayer, 37, has been accountable for the overall look and feeling of some of the search business's most well-known items.

Despite her qualifications, Ms. Mayer — who will be Yahoo’s fifth us president in less than a season, two of them temporary — will experience a complicated task.

A revolutionary Organization online that assisted shape the market in the 90's, Search engines is trying to stay appropriate after unable to evolve to modifying enhancements like innovative search technological innovation and social networking resources. As Search engines and Facebook or myspace have appeared as Web leaders, Search engines has fought to create a unique technique, even though its viewers continues to be among the biggest on the Online. Now, the organization is moving to lay off a large number of workers, in the face of slouching earnings and a bad stock.

The big question is whether Ms. Mayer — or anyone — can help Search engines restore its former built.

“It’s a very exciting leaving and a very exciting choice,” said Martin Sorrell, us chief executive of WPP, the massive advertising organization. “She comes with a powerful popularity, but we’ll see how she examines it all.”

With her consultation as the chief executive and us chief executive of Search engines on Thursday, Ms. Mayer connects a candidate of women in the technological innovation market to hold the top spot. The top level team contains Meg Whitman, the us chief executive of Hewlett-Packard, and Va M. Rometty, the head of I.B.M. Another mature lady in Rubber Area, Sheryl Sandberg, is Facebook’s primary managing official.

(In a bit of personal news, Ms. Mayer disclosed on Twitter late Monday that she is pregnant.)

The move to Yahoo is an opportunity for Ms. Mayer to step out on her own and claim a bigger stage. Ms. Mayer, an engineer by training whose first job at Google included computer programming, was behind the famously unadorned white search home page and the way users interacted with Gmail, Google News and Google Images. She also sat on Google’s operating committee, part of a small circle of senior executives who had the ear of Google’s co-founders, Larry Page and Sergey Brin.

Perhaps in a sign of grander ambitions, Ms. Mayer joined the board of Wal-Mart Stores in April, her first seat at a public company. She is one of four women on Wal-Mart’s 16-member board.

Still, Ms. Mayer did not have a clear path to the upper echelons of Google.

After years of heading up its search business, Google’s most profitable unit, Ms. Mayer became vice president of the company’s location and local services in late 2010, a group that included Google Maps and more than 1,000 product managers. But the following year, Google promoted another executive, Jeff Huber, to be the senior vice president for local and commerce, putting him one level above Ms. Mayer’s post. Although Google characterized her move as a promotion at the time, some wondered if she would be content with the reorganization.

Ms. Mayer, who was first approached about the job in the middle of June after returning from a trip to China, resigned from Google on Monday afternoon by telephone. She starts at Yahoo on Tuesday and will also join the board.

In an interview, Ms. Mayer said she “had an amazing time at Google,” where she has worked for the last 13 years, but that ultimately “it was a reasonably easy decision” to take the top job at Yahoo. She said Yahoo was “one of the best brands on the Internet.” She recalled that when she started at Google, the company would conduct user surveys and “people didn’t understand the difference between Yahoo and the Internet.”